US5129580A - Device for spraying disperse systems - Google Patents

Device for spraying disperse systems Download PDF

Info

Publication number
US5129580A
US5129580A US07/685,919 US68591991A US5129580A US 5129580 A US5129580 A US 5129580A US 68591991 A US68591991 A US 68591991A US 5129580 A US5129580 A US 5129580A
Authority
US
United States
Prior art keywords
plunger
coupling
head
nozzle
spray head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/685,919
Other languages
English (en)
Inventor
Rene Schmitter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lonza AG
Original Assignee
Lonza AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lonza AG filed Critical Lonza AG
Assigned to LONZA LTD., GAMPEL/VALAIS (DIRECTION: BASLE) SWITZERLAND reassignment LONZA LTD., GAMPEL/VALAIS (DIRECTION: BASLE) SWITZERLAND ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SCHMITTER, RENE
Application granted granted Critical
Publication of US5129580A publication Critical patent/US5129580A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/3066—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the valve element being at least partially hollow and liquid passing through it when the valve is opened
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3006—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the controlling element being actuated by the pressure of the fluid to be sprayed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
    • B05B15/522—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using cleaning elements penetrating the discharge openings
    • B05B15/5223—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using cleaning elements penetrating the discharge openings the cleaning element, e.g. a needle, and the discharge opening being movable relative to each other in a direction substantially parallel to the flow of liquid or other fluent material through said opening
    • B05B15/5225—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using cleaning elements penetrating the discharge openings the cleaning element, e.g. a needle, and the discharge opening being movable relative to each other in a direction substantially parallel to the flow of liquid or other fluent material through said opening the cleaning element being located upstream of the discharge opening or being actuated upstream therefrom

Definitions

  • the invention relates to a device for spraying disperse systems.
  • a cleaning element is slidably mounted which, at the same time is connected to a tip which in a relative movement of the cleaning element to the spray head can slide into an opening of the hole type nozzle to clean this opening (French Patent No. 569,852). In such case, the cleaning is to follow without interruption of the normal function of the spray head.
  • a spray valve for spraying viscous liquids which is designed as a needle valve, is known (U.S. Pat. No. 2,794,683).
  • a perforated disk is placed in a spray head of such needle valve concentric to its opening before the hole type nozzle.
  • a plunger, slidable inside of the spray head has on its head end a cylindrical or conical section which can be shoved through the perforated disk into the opening of the hole type nozzle to press dirt accumulation from such opening of the hole type nozzle.
  • the main object of the invention is to provide a simply-designed, easily-cleanable and quickly-interchangeable device by which disperse systems, which contain coarse-grained materials or polymers tending to gum, can be sprayed without reduction of the throughput over a considerable period.
  • This main object is achieved according to the invention by the design of the invention device for spraying with the features indicated herein (and by the invention process).
  • the invention involves a device for the spraying of disperse systems.
  • the invention device has a spray head with a hole type nozzle, an intake for disperse systems, with a plunger able to slide inside of the spray head in front of the opening of the hole type nozzle and a coupling connection to a supply element.
  • Plunger (1) has one or more ducts for the disperse system which, going from the coupling side of the plunger through the plunger, comes out into hollow space (2) of spray head (5).
  • the device according to the invention is used for spraying disperse systems, preferably suspensions, containing graphite in an upper grain size of 25 to 150 microns as the disperse phase and a liquid as the dispersing agent.
  • Such suspensions especially those that, besides the dispersing agent, also contain portions of stabilizers, dispersion auxiliary agents and polymers, for example, according to German OS 2,450,716, were able to be sprayed poorly when spraying rollers with known devices.
  • the plunger exhibits, axially to the coupling side, an intake duct (3) for the disperse system, from which one or more output ducts (4) branch off toward the nozzle side end.
  • output duct or ducts (4) are placed branched at an angle to intake duct (3) so that the disperse system radially to tangentially strikes the inside wall of spray head (5) configured as hollow space (2) or offset parallel to the axis to intake duct (3) so that the disperse system axially strikes the inside wall of spray head (5) configured as hollow space (2).
  • plunger (1) exhibits one or more ducts (6) which, starting from the coupling side of the plunger offset parallel to the axis running through the plunger laterally to the plunger tip, comes out into hollow space (2) of spray head (5).
  • the nozzle side end of plunger (1) exhibits a conical shape with an angle of taper of 15° to 90° and the inside of hole type nozzle (7) is matched to the plunger tip and the plunger, in its longitudinal direction, is configured to be movable by a spring (8) so that during the spraying process it is pressed back by the spraying pressure from spray head (5) and as soon as the spraying pressure drops to an undesired volume it is shoved permanently in front of the opening of hole type nozzle (7).
  • coupling (9) is designed as a holder of the spray device.
  • coupling (9) axially exhibits a passage duct (10) for the disperse system and is connected either axially or radially to housing (11) of the spray device.
  • coupling (9) is designed as a screw or plug coupling, preferably as a plug coupling.
  • the invention also involves a process for using the invention device for spraying of rollers during the hot rolling of sheets, hollow sections and other shapes, with a graphite-containing dispersion which contains graphite having a grain size of 50 to 150 microns.
  • FIG. 1 is a partial axial section through a first embodiment of the device of the invention
  • FIG. 2 is a partial axial section through another embodiment of the device of the invention with a modified guiding of the outlet ducts in the plunger;
  • FIG. 3 is a partial axial section through another embodiment of the device of the invention with a modified guiding of the ducts in the plunger;
  • FIG. 4 is a partial axial section through another embodiment of the device of the invention with a modified guiding of the ducts in the plunger;
  • FIG. 5 is a partial axial section through another embodiment of the device of the invention with radial connection of the coupling to the plunger device;
  • FIG. 6 shows a partial axial section of a variation of the embodiment according to FIG. 5 not belonging to the invention.
  • plunger (1) which is movable in the longitudinal direction by means of spring (8), is placed in housing (11) which, on one side, is connected to spray head (5) and, on the opposite side, to coupling (9).
  • Plunger (1) on the coupling side has intake duct (3) for the disperse system, from which two output ducts (4) branch off toward the nozzle side end, according to FIG. 1.
  • the number of output ducts can vary between one and ten, preferably between three and six.
  • Output ducts (4) are preferably designed as bores with diameters suitably between 0.5 and 3 mm.
  • Output ducts (4) in this case can be placed, e.g., according to FIG. 2, at a right angle relative to the axis of the spray device, at any angle to the axis, e.g., according to FIG. 1, or offset parallel to the axis according to FIG. 4 .
  • these ducts designed as bores it can be achieved that the disperse system radially to tangentially or axially strikes the inside wall of spray head (5) configured as hollow space (2).
  • one or more, suitably one to ten, preferably three to six, ducts (6) are provided which, starting from the coupling side of the plunger laterally to the plunger tip, come out into hollow space (2) of spray head (5).
  • these ducts are designed as bores whose diameters vary between 0.5 and 3 mm.
  • the nozzle side end of plunger (1) exhibits a conical tip.
  • the angle of taper is suitably 15° to 90° .
  • Hole type nozzle (7) toward the housing inside is matched in its shape to plunger (1).
  • the opening of hole type nozzle (7) can have the shape of a flat section or circular section jet.
  • the diameter of the nozzle is adjusted to the desired throughput and spray pattern and suitably is 0.3 to 4 mm.
  • Plunger (1) is designed to be movable in its longitudinal direction by spring (8) so that during the spraying process it is pressed back by the spraying pressure from spray head (5) and, as soon as the spraying pressure drops to an undesired volume, it is shoved permanently in front of the opening of hole type nozzle (7).
  • Coupling (9) is suitably designed as a plug or screw coupling and suitably exhibits axially a flow duct (10) for the disperse system.
  • Coupling (9), according to FIGS. 1 to 4 can be connected axially to the spray device or, according to FIG. 5, radially to the spray device. If, according to the configuration of FIG. 5, coupling (9) is radially connected to the spray device, according to FIG. 6, the disperse system can be guided directly into hollow space (2) of spray head (5) without passing through ducts of the plunger.
  • Coupling (9) preferably is used at the same time as a holder of the spray device.
  • a plug coupling is used which is configured so that, with a handle, it can be inserted with a radial movement into counterhousing (12) o supply element (13) and be radially locked.
  • the spray device is supplied with the disperse system by supply element (13), which is configured as a supply pipe or distributor with pump devices known in the art.
  • the pressures used in this case are in the range of 5 to 100 bars, suitably between 20 and 80 bars.
  • Coarse-grained materials and polymers tending to gum can be sprayed without reduction of the throughput with the device according to the invention.
  • the plunger is briefly pressed from the hollow space in the spray head on the hole type nozzle, by which particles possibly clogging the hole type nozzle are pressed out through the latter. After the retraction of the plunger, the hole type nozzle is again fully operative.
  • Hole type nozzles with nozzle openings of 0.5 to 1.0 mm are used for such suspensions.
  • the spray device can also be used for other known disperse systems which, for example, on contact with the air tend to gum, or because of the particle size of the disperse phase thus far have been able to be sprayed poorly or not at all with known devices.
  • the plunger can be controlled so that, after stopping of the feeding of the disperse system, it is pressed into the hole type nozzle, thereby at the same time cleaning and securely sealing the hole type nozzle. With a renewed feeding of the disperse system, the plunger can again be retracted into the spray head.
  • the device according to the invention is used especially for spraying of graphite-containing dispersions containing graphite with a grain size of 25 to 150 microns, during the hot rolling of sheets, sections and other shapes.

Landscapes

  • Nozzles (AREA)
  • Catching Or Destruction (AREA)
  • Coating Apparatus (AREA)
  • Manipulator (AREA)
US07/685,919 1990-04-27 1991-04-16 Device for spraying disperse systems Expired - Fee Related US5129580A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1441/90 1990-04-27
CH144190 1990-04-27

Publications (1)

Publication Number Publication Date
US5129580A true US5129580A (en) 1992-07-14

Family

ID=4210534

Family Applications (2)

Application Number Title Priority Date Filing Date
US07/685,919 Expired - Fee Related US5129580A (en) 1990-04-27 1991-04-16 Device for spraying disperse systems
US07/691,331 Expired - Fee Related US5114123A (en) 1990-04-27 1991-04-25 Manipulator for manipulating a pouring pipe into position beneath a metallurgical vessel

Family Applications After (1)

Application Number Title Priority Date Filing Date
US07/691,331 Expired - Fee Related US5114123A (en) 1990-04-27 1991-04-25 Manipulator for manipulating a pouring pipe into position beneath a metallurgical vessel

Country Status (7)

Country Link
US (2) US5129580A (de)
EP (1) EP0453801B1 (de)
JP (1) JPH0550119A (de)
AT (1) ATE117917T1 (de)
CA (1) CA2041208A1 (de)
DE (1) DE59104453D1 (de)
ES (1) ES2067074T3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2289427A (en) * 1994-05-13 1995-11-22 Robert Richard Chicken Self-cleaning nozzle having pin actuated by fluid flow
US5911363A (en) * 1997-03-10 1999-06-15 Spratronics, Inc. Vehicle mounted spray apparatus and method
US20020092278A1 (en) * 2001-01-12 2002-07-18 Sealed Air Corportion (Us) Fluid dispenser having improved cleaning solvent delivery system
US20040164100A1 (en) * 2003-02-24 2004-08-26 Piucci Vincent A. Self-cleaning fluid dispenser
CN103639081A (zh) * 2013-10-28 2014-03-19 王云荣 一种可变流量喷头

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2870986B2 (ja) * 1990-05-23 1999-03-17 品川白煉瓦株式会社 浸漬ノズル交換装置
DE9208796U1 (de) * 1992-07-01 1992-10-08 Suttner GmbH & Co KG, 4800 Bielefeld Strahldüse für Hochdruckreinigungsgeräte
FR2733705B1 (fr) * 1995-05-05 1997-06-13 Vesuvius France Sa Dispositif et procede de changement d'un tube de coulee continue de repartiteur d'acierie
WO1997028917A1 (fr) * 1996-02-06 1997-08-14 Shinagawa Refractories Co., Ltd. Appareil de remplacement d'une busette immergee
US5992711A (en) * 1997-04-22 1999-11-30 Toshiba Ceramics Co., Ltd. Integrated submerged entry nozzle and its manufacture
DE19957055A1 (de) * 1999-11-27 2001-05-31 Mika Heiztechnik Gmbh Einrichtung zum Zuführen von vorzugsweise flüssigen oder gasförmigen Brennstoffen in einen Brennraum

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US876453A (en) * 1906-02-07 1908-01-14 William Henry Heard Spray-nozzle.
US1007325A (en) * 1911-05-16 1911-10-31 Carl Boehme Oil-burner tip.
FR569852A (fr) * 1921-02-22 1924-04-18 Tête de pulvérisateur
US1630974A (en) * 1925-07-23 1927-05-31 Shelor Olie Warren Spray nozzle
US1716195A (en) * 1927-04-28 1929-06-04 American Stove Co Vaporizer and method of making the same
US2017467A (en) * 1934-11-23 1935-10-15 Leavitt R Loomis Spray nozzle
US2135925A (en) * 1936-11-13 1938-11-08 Tuscher Jean Edouard Fuel injecting device for internal combustion engines
US2794683A (en) * 1954-06-15 1957-06-04 Ind Molasses Corp Spraying nozzle
US3203629A (en) * 1963-03-29 1965-08-31 Beloit Corp Shower nozzle
US3295169A (en) * 1963-12-23 1967-01-03 Ernest P Moslo Spring-pressed shutoff for injection nozzle
DE2450716A1 (de) * 1974-05-08 1975-11-27 Lonza Ag Hochtemperaturschmiermittel fuer die warmverformung von metallen
US4010903A (en) * 1974-06-27 1977-03-08 Torazo Saito Nozzle for injection molding of thermoplastics
DE2724931A1 (de) * 1976-06-21 1977-12-29 Lonza Ag Vorrichtung zum verspruehen von dispersen systemen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191209563A (en) * 1912-04-23 1912-12-19 Henry Gardiner Atkinson Improvements in and relating to Spraying Devices.
DE2318458B2 (de) * 1973-04-12 1980-09-04 Lechler Gmbh & Co Kg, 7012 Fellbach Einrichtung zur dichtenden Befestigung von Düsen an Leitungsteilen
CH598888A5 (de) * 1976-03-09 1978-05-12 Concast Ag
FR2409809A1 (fr) * 1977-11-29 1979-06-22 Daussan Henri Jean Dispositif de manoeuvre pour tube ou busette de coulee
US4381102A (en) * 1979-10-29 1983-04-26 Flo-Con Systems, Inc. Shroud support and method for shroud engagement with teeming valve
GB8705482D0 (en) * 1987-03-09 1987-04-15 Ici Plc Dispensing apparatus

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US876453A (en) * 1906-02-07 1908-01-14 William Henry Heard Spray-nozzle.
US1007325A (en) * 1911-05-16 1911-10-31 Carl Boehme Oil-burner tip.
FR569852A (fr) * 1921-02-22 1924-04-18 Tête de pulvérisateur
US1630974A (en) * 1925-07-23 1927-05-31 Shelor Olie Warren Spray nozzle
US1716195A (en) * 1927-04-28 1929-06-04 American Stove Co Vaporizer and method of making the same
US2017467A (en) * 1934-11-23 1935-10-15 Leavitt R Loomis Spray nozzle
US2135925A (en) * 1936-11-13 1938-11-08 Tuscher Jean Edouard Fuel injecting device for internal combustion engines
US2794683A (en) * 1954-06-15 1957-06-04 Ind Molasses Corp Spraying nozzle
US3203629A (en) * 1963-03-29 1965-08-31 Beloit Corp Shower nozzle
US3295169A (en) * 1963-12-23 1967-01-03 Ernest P Moslo Spring-pressed shutoff for injection nozzle
DE2450716A1 (de) * 1974-05-08 1975-11-27 Lonza Ag Hochtemperaturschmiermittel fuer die warmverformung von metallen
US4010903A (en) * 1974-06-27 1977-03-08 Torazo Saito Nozzle for injection molding of thermoplastics
DE2724931A1 (de) * 1976-06-21 1977-12-29 Lonza Ag Vorrichtung zum verspruehen von dispersen systemen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2289427A (en) * 1994-05-13 1995-11-22 Robert Richard Chicken Self-cleaning nozzle having pin actuated by fluid flow
US5911363A (en) * 1997-03-10 1999-06-15 Spratronics, Inc. Vehicle mounted spray apparatus and method
US20020092278A1 (en) * 2001-01-12 2002-07-18 Sealed Air Corportion (Us) Fluid dispenser having improved cleaning solvent delivery system
US6996956B2 (en) * 2001-01-12 2006-02-14 Sealed Air Corporation (Us) Fluid dispenser having improved cleaning solvent delivery system
US20040164100A1 (en) * 2003-02-24 2004-08-26 Piucci Vincent A. Self-cleaning fluid dispenser
US20040195268A1 (en) * 2003-02-24 2004-10-07 Piucci Vincent A. Self-cleaning fluid dispenser
US6811059B2 (en) 2003-02-24 2004-11-02 Sealed Air Corporation (Us) Self-cleaning fluid dispenser
US7013615B2 (en) 2003-02-24 2006-03-21 Sealed Air Corporation (Us) Self-cleaning fluid dispenser
CN103639081A (zh) * 2013-10-28 2014-03-19 王云荣 一种可变流量喷头
CN103639081B (zh) * 2013-10-28 2017-01-25 重庆新陆农业开发有限公司 一种可变流量喷头

Also Published As

Publication number Publication date
ATE117917T1 (de) 1995-02-15
EP0453801A3 (en) 1991-12-11
DE59104453D1 (de) 1995-03-16
EP0453801B1 (de) 1995-02-01
EP0453801A2 (de) 1991-10-30
ES2067074T3 (es) 1995-03-16
JPH0550119A (ja) 1993-03-02
CA2041208A1 (en) 1991-10-28
US5114123A (en) 1992-05-19

Similar Documents

Publication Publication Date Title
US5129580A (en) Device for spraying disperse systems
US4456181A (en) Gas liquid mixing nozzle
US4513913A (en) Reversible airless spray nozzle
US4221339A (en) Liquid spraying device
US4386739A (en) Nozzle for hydrostatic fluid tip
US5129583A (en) Low pressure loss/reduced deposition atomizer
US5119991A (en) Self-cleaning nozzle and associated method
US4712739A (en) Spray gun nozzle assembly retainer clip and spray gun nozzle assembly
ATE178508T1 (de) Durch ansaugen gespeiste düse für niederdruckspritzpistolen
EP0946305B1 (de) Vorrichtung zur aerosolerzeugung
KR920019425A (ko) 유체 스프레이 건
KR970005401A (ko) 액상 제품 분무 방법 및 장치
WO2000015347A2 (en) Purging arrangement for a powder coating system
EP0501164A1 (de) Injektordüse für Hochdruckreinigungsgerät
CA1321809C (en) Spray nozzles
US20130032644A1 (en) External mix air atomizing spray nozzle assembly
GB2181975A (en) Nozzle for atomization of fluids
US4269355A (en) Self-cleaning spray nozzle
US4159082A (en) Spray gun
US3795348A (en) Device for delivering particulate material
JP2802496B2 (ja) 噴霧ノズル
DE10116051B4 (de) Sprühdüse für Wirbelschichtanlagen
US3752400A (en) Combined spray and anti-clogging means
GB2229653A (en) Nozzle assembly for spraying concrete
EP0845300A2 (de) Flüssigkeitszerstäubungsdüse

Legal Events

Date Code Title Description
AS Assignment

Owner name: LONZA LTD., GAMPEL/VALAIS (DIRECTION: BASLE) SWITZ

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCHMITTER, RENE;REEL/FRAME:005676/0588

Effective date: 19910405

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 20040714

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362